Why does decimal.Radix result in a CS0117 Error?

Question

TL;DR How do I access Decimal.Radix?

For the learning of it, I am trying to implement my own fraction type. The type should implement System.Numerics.INumber<TSelf>, which includes System.Numerics.INumberBase<TSelf>, which includes the property definition public static abstract int Radix { get; }.

The documentation is surprisingly short so I tried simple experiments to aid in understanding of what .Radix really means. None of these experiments could successfully access the INumberBase<TSelf>.Radix property of any BCL type which implements it.

I checked the documentation and introductory writings on Generic Math. The closest I came to an answer was the introductory blog post: .NET 7 Preview 5 – Generic Math, Tanner Gooding which had this to say on the matter, although specifically about IFloatingPoint:

you can get the Sign, Radix, Exponent, and Significand out allowing you to construct the exact value as -1^Sign * Radix^Exponent * Significand (the standard algorithm for IEEE 754 values and which is more generally extensible to rational values).

So it seems that if a type implements either IFloatingPoint or INumberBase<TSelf> then one should be able to do something like int a = T.Radix and get back the base of T, however:

// .NET 7, 8
using System.Numerics;

int a = Decimal.Radix;

results in a CS0117 'decimal' does not contain a definition for 'Radix' whose link has explanation:

'type' does not contain a definition for 'identifier'.

This error occurs in some situations when a reference is made to a member that does not exist for the data type.

Edit for Possible Duplicate:

The workaround found in Access Abstract Interface Member C#11:

public static T GetAdditiveIdentity<T>() where T: INumber<T> => T.AdditiveIdentity;

Works for AdditiveIdentity but not for Radix:

Console.WriteLine(GetRadix<decimal>());
static T GetRadix<T>() where T : INumberBase<T> => T.Radix;
// where T : INumber<T> does not change the error or message
// where T : IFloatingPoint<decimal> does not change the error or message

Results in a CS0029 Cannot implicitly convert type 'int' to T, which has information about explicit conversions.

How do I access Decimal.Radix?